Bio:Sebastian Shaw is the leader of the Ultimate universe's Hellfire Club. As the black king of the inner circle, it was him who was behind the Phoenix Force attempting to find its way into a host.

At a party thrown in honor of the X-Men by the Hellfire Club, Shaw orchestrated the events that led up to the Phoenix Force being released. During the party, he assaulted the X-Men and allowed Marvel Girl's psychosis to take over. However, he was murdered by the Phoenix, along with the remainder of the inner circle of the Hellfire Club, once the Phoenix had possessed Jean.

Notes:The Ultimate version of this character is not an alternate identity of the regular Marvel character as the Ultimate universe is a distinct reality.
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